| From | Sasha Levin <> | Subject | [PATCH AUTOSEL 5.4 74/84] iommu/vt-d: Fix page request descriptor size | Date | Wed, 15 Apr 2020 07:44:31 -0400 |
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From: Jacob Pan <jacob.jun.pan@linux.intel.com>
[ Upstream commit 52355fb1919ef7ed9a38e0f3de6e928de1f57217 ]
Intel VT-d might support PRS (Page Reqest Support) when it's running in the scalable mode. Each page request descriptor occupies 32 bytes and is 32-bytes aligned. The page request descriptor offset mask should be 32-bytes aligned.
Fixes: 5b438f4ba315d ("iommu/vt-d: Support page request in scalable mode") Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com> Signed-off-by: Liu Yi L <yi.l.liu@intel.com> Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Signed-off-by: Joerg Roedel <jroedel@suse.de> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/iommu/intel-svm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c index 3020506180c10..1d3816cd65d57 100644 --- a/drivers/iommu/intel-svm.c +++ b/drivers/iommu/intel-svm.c @@ -502,7 +502,7 @@ struct page_req_dsc { u64 priv_data[2]; }; -#define PRQ_RING_MASK ((0x1000 << PRQ_ORDER) - 0x10) +#define PRQ_RING_MASK ((0x1000 << PRQ_ORDER) - 0x20) static bool access_error(struct vm_area_struct *vma, struct page_req_dsc *req) { -- 2.20.1
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